Making-ready process.



A.V.PAUL. MAKING READY PROCESS.

APPLICATION FILED JAN.20, 1914.

Patented Sept. 22,1914.

IlaiIlIl/II NITE STATES PATENT OFFICE.

ALBERT V 'ICTOR PAUL, OF LAMBHILL, GLASGOW,-SCOTLAND.

MAKING-READY PROCESS.

To all whom itmag concern.

Be it known that I, ALBERT VICTOR RAUL, a subject of the King of England,residing at 3 Hillend road, Lambhill, Glasgow, Scotland, have invented certain new and useful Improvements in Making-Ready Processes, of which the following is a specification.

This invention relates to letter-press printing by means of stereotype or other plates or their equivalent as used on rotary and on fiat bed machines, and has for its object to provide for the more. ready and effective leveling or. making ready of the printing surfaces of such plates or thelike in orderto obtain a uniform printed impression therefrom, free from the occurrence of heavy and light parts due to that variation in the level of the type. which is found in the cast plates or their equivalent.

' The invention comprises the hereinafter described improved process of effecting the aforesaid leveling or making ready of the printing plates or the like.

According to the present ordinary method of making ready, the type. plate is mounted on the'prlnting machine and a first impression printed therefrom. The paper 'with such impression thereon is then examined and in places corresponding with the parts Where the impression or printing is very light, pieces of paper are pasted and underlaying or overlaying as it is termed, according as to whether the paper. is inserted beneath the printing plate or upon or adjacent to the rotary or flat impression surface, is repeated until a uniform impression is obtained. It has'been proposed to produce making ready pieces from plastic materials molded or cast so as to have the required contour. A further proposal involves the use of chemical means for treating the making ready piece.

. In making ready, in accordance with this invention, I mount the type plates, if intended for use in a rotary printing machine, upon a cylinder of the same diameteras the cylinder of the-machine-on which they will be subsequently mounted for service. The surface of the type is then coated with ink, after which a sheet-of stout paper, or other suitablematerial, is tightly stretched pve'r the said surface and secured thereon.

The cylinder is; now rotated and during such Specification of Letters Patent.

rotation the surface of the aforesaid paper, or its equivalent, is caused to contact with a revolving emery Wheel, or other suitable abrasive, With the result that at those parts where the type beneath it is high the paper will be ground away and there will be pro duced a sheet of varying thickness, the variation corresponding with the variation or irregularity in the level of the type.

The accompanying drawing gives a diagrammatic illustration of the grinding 0-peration aforesaid.

The type plate or its equivalent a is mounted on the cylinder or the like I), and

over the outer surface of the type or printing face of a. there is placed the sheet of stout paper or its equivalent a, which is to form the making-ready piece as hereinafter described. The grooves .or recesses (Z give an exaggerated indlcati-on of the variation in the level of the printing face of the plate a.- The emery wheel or abrasive-is represented by 6.

ready piece 0 (which is rotated with 6) into contact, the parts of c which have the high or projecting portions of the type plate a beneath them will be ground down, While the parts of 0 having the depressed portions Patented Sept. 22, 1914. Application filed January 20, 1914. Serial No. 813,293.

I i On setting I) and c in rotation and br nging the latter and the making of a (represented by therecesses (Z) beneath them will yield and so escape grinding.

The aforesaid grinding or thinning of the paper may be effected in various waysand with various material and either by hand or power. In some cases the surface of the making ready piece may be simply rubbed over the abrasive surface or vice-versa. After the conclusion of such grinding or rubbing down operation, the sheet of paper or other material is stripped ofl and the type plate or plates or their equivalent mounted on the cylinder of the machine on which the printing is to he done. A sheet of clean paper is now wound around the blanket cylinder of the machine and an impression printed thereon. The aforesaid I sheet of ground down material or making ready piece, is then fastened around the blanket cylinder, with its ground surface inmost and the printing machine can be prepared and started. to Work in a very expeditious and convenient manner.

'The invention is applicable for printing with machines of various kinds, either rotary or flatbed. The making ready piece may be applied either asan overlay, as hereinbefore described, on the blanket cylinder or its equivalent, or as an underlay beneath the. printing plates or their equivalent, or two making ready pieces may be employed,

the underlay piece being prepared and placed in position before the overlay iece is prepared. This double making rea y will not asa rule be necessary, but may be adopted with a very irregular printing plate.

Having now particularly described and ascertained the nature of my'said invention Copies 0f this patent may be obtained to!!!" cents each, by addressing the Commissioner of Patents,

and in what manner the same is to be performed, I declare that what I claim is 1. The herein described process which consists of grinding the making ready piece While it is in contact with the printing surface whereby is produced a sheet of varying thickness, substantially as and for the purpose set forth.

2. The herein, described process which consists of grinding away portions of 'the making ready piece to compensate for Variations in the level of the printing surface whereby there is produced a sheet of varyingthickness, substantially as described.

3. The herein described process which consists in-placing the making ready piece in contact with the printing surface and grinding those portions over the high parts of the type plate, the portions over the low parts yielding.

In testimony whereof, I 'afiix my signature in presence of two witnesses.

ALBERT VICTOR PAUL. Witnesses:

R. J. MACFARLAN-E, JOHN N. MCCUAN, Jr.

' Washington, D. 0. 

